#include <stdio.h>
main()
{
	char c;
	int letters=0,space=0,digit=0,others=0;
	printf("Pls input some characters:\n");
	while((c=getchar())!='\n')
	{
		if(c>='a'&&c<='z'||c>='A'&&c<='Z')
			letters++;
		else if(c==' ')
			space++;
		else if(c>='0'&&c<='9')
			digit++;
		else
			others++;
	}
	printf("all in all char=%d space=%d digit=%d others=%d",letters,space,digit,others);
}
